[Recipes] How to switch between 2 accounts in AWS

We will be giving access to the S3 bucket of Account B to Account A.

1. Create a role with necessary permissions in Account B.
   1. Create a Policy 'Account_B_Policy' with access to the S3 buckets of the account
   2. Create a Role 'Account_B_Role' by selecting the trusted entity as another AWS account. Provide the account id of Account A while selecting the trusted entity
   3. Assign the policy 'Account_B_Policy' to 'Account_B_Role'.
2. Grant access to the user groups in Account A to assume that role from Account B providing the complete role ARN.
   1. Create a policy 'Account_A_Policy' with permission as STS:AssumeRole and provide the ARN of 'Account_B_Role'.
   2. Create a group 'Account_A_Group' and assign the 'Account_A_policy' to this group
   3. Assign 'Account_A_Group' to 'testuser'.
3. Sign in as a user from the testusergroup(Account_A_Group) into Account A and switch role to Account B.
   1. Login as 'testuser' to Account A.
   2. On the top upper right side , there will be a dropdown along with the logged in username where you can find the 'Switch Role' option
   3.  Click 'Switch Role', provide the account id and Role name and click 'Switch Role'
   4. You will be redirected to the other AWS account where you can perform allowed actions
   5. You will have the option to switch back to the curren test user account